I'll stick with my landslide simile here and say this: This is not on you, people don't notice the beginning of landslides, when it's just two, four, a dozen stones moving. You really only notice that the landslide exists, once it reaches a certain threshold. Things like this grow exponentially, it can grow 10 years without you noticing anything but suddenly it doubles in 5 years, then in two and then again in 1 and suddenly it's everywhere.

And trends are only ever obvious in hindsight. The earlyiest occurences don't stick in your memory, because you haven't yet registered that it's a thing that's happening.